Vehicle-mounted multimedia device and control method thereof

A vehicle-mounted multimedia and control method technology, applied in the field of single-chip microcomputer and its firmware upgrade, can solve problems such as online upgrade failure, and achieve the effect of improving reliability and stability

Inactive Publication Date: 2014-04-30
ANHUI TATFOOK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention provides a single-chip microcomputer upgrade method, which can solve the problem of online upgrade failure caused by abnormal problems encountered during the online upgrade of the single-chip microcomputer, and can ensure reliable product upgrades

Method used

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  • Vehicle-mounted multimedia device and control method thereof
  • Vehicle-mounted multimedia device and control method thereof
  • Vehicle-mounted multimedia device and control method thereof

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] Such as figure 1 As shown, a control method of a vehicle-mounted multimedia device of the present invention, the vehicle-mounted multimedia includes a vehicle-mounted computer, a vehicle state monitor, a CAN-USB single-chip microcomputer connected with the vehicle-mounted computer and the vehicle state monitor, and the control method include:

[0040] S101. After the CAN-USB MCU is powered on or reset, execute the boot program. The boot program is BOOT cod...

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Abstract

The invention discloses a vehicle-mounted multimedia device and a control method thereof. The vehicle-mounted multimedia device comprises a vehicle-mounted computer, an automobile state monitor, and a CAN-USB (Controller Area Network-Universal Serial Bus) singlechip which is connected with the vehicle-mounted computer and the automobile state monitor. The control method comprises the following steps: powering on or resetting the CAN-USB singlechip, and executing a bootstrap program; performing CRC (Cyclic Redundancy Check) on a firmware file stored in the CAN-USB singlechip by using the bootstrap program; if the CRC is passed, loading the firmware file through the CAN-USB singlechip, acquiring the monitoring data of the automobile state monitor through a CAN interface, converting the monitoring data into USB interface data, and transmitting the USB interface data to the vehicle-mounted computer; if the CRC fails, updating the firmware file from the vehicle-mounted computer or a backup storage area inside the singlechip by using the CAN-USB singlechip. By adopting the vehicle-mounted multimedia device and the control method thereof, unrecoverable damages to the vehicle-mounted computer due to no response of the program caused by failure in firmware upgrade in the vehicle-mounted CAN-USB singlechip can be avoided, and the reliability of the CAN-USB singlechip and the stability of the vehicle-mounted computer are improved.

Description

technical field [0001] The invention relates to the field of vehicle-mounted multimedia, in particular to a single-chip microcomputer and a firmware upgrading method thereof. Background technique [0002] Existing vehicle-mounted multimedia mainly includes a vehicle-mounted computer, a vehicle status monitor, and a CAN-USB single-chip microcomputer connected with the vehicle-mounted computer and the vehicle status monitor. Among them, the vehicle status monitor usually includes sensors such as voltage, current and speed, which are connected to the CAN-USB microcontroller through the CAN bus, and the CAN-USB microcontroller is connected to the vehicle computer through the USB interface. When receiving the incoming CAN bus data, it converts the CAN bus data into USB data and forwards it to the on-board computer terminal. The on-board CAN bus is a communication bus for monitoring various indicators of electric vehicles, and its stability requirements are more stringent. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445G06F11/08
Inventor 李广涛
Owner ANHUI TATFOOK TECH CO LTD
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